can i wear my own shorts for amatuer fights, not international bouts.
depends, some clubs make you wear their strip.
i got some wicked fight shorts, i’ll have to see what my trainer says about me wearing em on my first amatuer fight. 
Not to hijack the thread, but would these be allowed in most cases or not?
https://secure.utilikilts.com/index.asp?PageAction=VIEWPROD&ProdID=38#longdesc
Those would be invaluable for the psychological warfare when you drop them at your feet, or in the rare case that they send you sprawling. :o